Lamp-controller for electric blue-printing apparatus.



N0.-747-,338. PATENTED DEC. 15, 1903. S. B. WHINERY.

LAMP CONTROLLER FOR ELECTRIC BLUE PRINTING APPARATUS.

APPLICATION FILED AUG.27. 1902.

NO MODEL.

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UNITE STATES Patented December 15, 1903.

PATENT OFFICE.

SAMUEL BRENT WHINERY, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE PITTSBURGH BLUE PRINT COMPANY, A CORPORATION OF PENN- SYLVANIA.

LAM P-CONTROLLER FOR ELEQTRIC BLUE-PRINTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 747,338, dated December 1903- Application filed August 27,1902. Serial No. 121,182. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL BRENT WHIN- ERY, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Lamp-Controllers for Electric Blue-Printing Apparatus, of which the following is a specification.

In the accompanying drawings,which make part of this specification, Figure I is a general view of my invention, the electrical features being shown diagrammatically and the other features in elevation, perspective, and section. Fig. II is a fragmentary view showing a modified way of actuating the motor and lamp-switch.

My invention relates to mechanism for controlling electric lamps used in connection with apparatus for copying drawings, pictures, sketches, and the like.

More particularly, my invention relates to mechanism for stopping the descent of the lamp at any predetermined place, causing it to ascend to its place of starting,and cutting ofi the current that feeds the lamp when the lamp has reached its highest or its lowest position at the option of the attendant.

My invention has also other minor feat nres, which will be pointed out in the descriptive portion hereof.

1 represents in vertical section the usual glass cylinder, between which and the cover 2 are placed the drawings, sketches, pictures, 850., (shown in dotted lines,) which are to be copied.

3 is an arc-lamp suspended by cords 4, which run over sheaves 5 and are secured to the weight 6, which partially balances the weight of the lamp. The arc-lamp will when the weight 6 is free to rise descend into the cylinder 1. The weight 6 has secured to it a cord 7, which travels on the sheaves 8 and is secured to the traveling nut 9, in which the fixed vertical screw 10 works. The screw 10 has bearings in the foot-plate 11 and ledge 12 of bracket 18. Slidable in said foot-plate 11 and bracket 12 is a vertical controller-rod 14, which loosely fits a vertical opening 15 in the not 9. Slidable on the rod 14 near its lower end is a collar 16, adjustable thereon by means of the set-screw 17. Said screw 10 is rotated by the worm-gearing 18 and bevelgearing 18, driven by the electric motor 19, having wires a and 5 connected to field-wire m and wires 0 and (1 connected to the armature y.

Pivoted at 20, 21, and 22 are the three arms 23, 24, and of a switch for controlling current for the motor and the lamp. The arms 23, 24, and 25 are connected by the link 26, which causes all of the arms to travel together. The central arm 24 is longer than the others, and its outer end is connected to the cord 27, which passes over the four sheaves 28. Near the top of the limb of the cord opposite that to which the arm 24 is connected is a lever 29, pivoted at 30. One end of the lever 29 is secured to the cord 27. The other end lies in the path of the collar 31, secured to the rod 14 above the lever and in the path of the not 9, which lies below the lever. The rod 14 has its lower rounded end in hole 11 in the plate 11 and is normally supported on the beveled end of the friction dog or pin 14,which is pushed against the rod 14 by the spring 14 Wire a leads from the field-wire mof the motor to binding-post a, thence to the pivot 21 of arm 24 and pivot 22 of arm 25, thence to binding-post a to which is connected the wire a leading to the source of electric energy. (Not shown.) From the motor 19 wire 1) leads to binding-post b, thence to the pivot of arm 23, and thence to the binding-post 19 which is connected to said source of electric energy by wire 19 It is evident that the current for the field of the motor invariably passes over the same course whatever position the switch may assume. Wire 0 leads from the motor 19 to binding-post c and thence to fixed contact 0 which is closed by arm 23 in its uppermost position. (Shown in full lines.) Contact 0 is connected by wire 0 with fixed contact 0 which is closed by arm 24 in its lowermost position. (Shown in dotted lines.) Wire d leads from the motor 19 to binding-post d, thence to the variableresistance motor-regulator 32, and thence to fixed contact d which is closed by arm 23 in its lowermost position. (Shown in dotted lines.) Contact 0Z is wired to fixed contact (1 which is closed by arm 24 in its uppermost position. (Shown in full lines.)

6 and e are fixed contacts closed by arm 25 in its full-line and dotted-line positions, respectively. These two contacts are joined by wire 6 which leads to binding-screw 6 A branch wire 6 leads to binding-post c from wire 6 at a point between binding-post b and pivot 20. The wire leading from post e is provided with a hand-switch 33. Lamp 3 is connected by wire f with binding-screw e and by wire f with binding-screw 6 wire f leading through the rheostat 34.

The wires shown in dotted lines are those that lie on the underside of the switchboard 35.

The operation is as follows: The drawings to be copied, together with sensitized paper, are placed between the cylinder 1 and the cover 2. The switch-arms are raised by hand to the positions shown by full lines. Ourrent is supplied to the field-wires to the motor 19 through wire a binding-screw a pivot 21, binding-post afland wire a. From the motor the current returns through wire 19, binding-post Z), pivot 20, binding-post b and wire 6 to the source of electric energy from which the wire 0. leads. Current is supplied to the armature of the motor 19 through wire (1 binding-post (t pivot 21, arm 24, contact d and d resistance 32, binding-post d, and wire d. From the armature current returns through wire 0, binding-post 0, contact 0 arm 23, pivot 20, binding-post b and wire I) to the said source of energy. Current from wire a also passes from wire a through to pivot 22, arm 25, contact e, wire 6 binding-post e wire f, lamp 3, wire f, rheostat 34, binding-post e, and wire b to wire b The current supplied to the motor causes it to revolve the gearing l8 and screw 10 in such a manner as to cause the nut 9 to descend. As the nut descends the weight 6 is caused to rise by reason of the greater weight of the lamp 3. As the weight rises, the lamp supplied with current through wires f and f descends into the printing-cylinder and causes a reproduction of the drawings to be made on the sensitized paper. The lamp will descend until the nut contacts with the collar 16 and moves the rod 14 downwardly. As soon as the end of rod 14 has passed below the bevel on dog 14, the weight of the rod causes it to fall to the bottom of hole 11, as the dog is not then pressed against the rod sufficiently to prevent the latter from falling. The downward movement of the rod 14 causes the collar 31 to engage and swing the righthand end of lever 29 downwardly. This movement of the lever 29 causes a left-hand movement of the cord 27 and a downward movement of the switch-arms 23, 24, and 25 into the positions shown in dotted lines. The course of the current supplied to the fieldwire remains as before, since the wires a and b are taken from the pivots of the said arms. However, the current to the armature has been reversed, now entering by wire 0 and passing out by wire d, as follows: through wire a binding-post a pivot 21, arm 24, contact 0, wire a contact 0 binding-post 0, wire 0, armature of motor 19, wire (I, binding-post d, resistance 32, contact 61 arm 23, pivot 20, binding-post b and wire U. The current passing from wire Ct to wire f now flows from pivot 22 and arm 25 through contact 6, switch 33, to wire 0 The change here is that arm 25 has been moved from contact 0 to contact 6, the latter lying in the circuit of hand-switch 33. If the switch 33 remains closed, the lamp will still remain lighted when arm 25 is on contact 0; but if the switch has been opened lamp 3 will remain extinguished when the arm 25 is on contact 6. As soon as the switch-arms have been moved to the dotted positions the motor will be reversed and the nut will travel up the screw and pull the weight 6 down, causing the lamp to be raised. During the ascent of the lamp it will be lighted or not, according to whether or not the switch 33 is closed or open. At the moment the lamp is sufficiently above the cylinder 1 the nut. 19 will engage the under side of the right-hand end of lever 29 and cause the switch-arms 23, 24, and 25 to be lifted from contacts (1 c", and 8, respectively. This movement of the arms cuts off the current from the motor, which is regulated to stop so that the several arms will not reach their upper contacts 0 (Z and e.

The manual-regulator 32 is used to vary the speed of the lamp in accordance with re quirements of the sensitized paper and the sketches. When the latter are thin or the former are very quick, the lamp should travel faster than when the opposite conditions obtain. The length of time of printing can also be varied by use of the switch 33, since when it is closed the lamp will burn during its ascent.

In the form of my invention illustrated in Fig. 11, I have dispensed with cord 27, sheaves 28, and lever 29 and have connected the rod 14 and the arm 24 of the switch by arm or link 36. The action of the rod 14 is the same as when the cord 27 and lever 29 are used, since when the nut engages collar 31 the switch is raised and when the nut engages collar 16 the switch is lowered.

I do not desire to be limited to the precise details of construction shown or described, but include within my invention all changes in form, position, and arrangement as may suggest themselves to those skilled in the art to which the same appertains.

Having described my invention, I claim- 1. In a lamp-controller for electric printing apparatus, a lamp, a motor for causing the lamp to travel, and means for causing the direction of travel of the lamp to be changed.

2. In a lamp-controller for electric printing apparatus, a lamp, a motor for causing the lamp to travel, and means for causing the direction of travel of the lamp to be changed automatically.

3. In a lamp-controller for electric printing apparatus, a lamp, a motor for causing the lamp to travel back and forth,means for causing the direction of the travel of the lamp to be changed,and means for automatically causing the motor to stop.

4. In a lamp-controller for electric printing apparatus, a lamp, a motor, a screw rotated thereby, a nut on the screw, and connections between the nut and the lamp, whereby the motor may cause the lamp to travel.

5. In a lamp-controller for electric printing apparatus, a lamp, a motor, a screw rotated thereby, a nut on the screw, a weight partially balancing the lamp, connections. between the nut and the weight, whereby the motor may cause the lamp to travel.

6. In a lamp-controller for electric printing apparatus, an electric lamp, a motor for causing the lamp to travel, and means for extinguishing the lamp automatically at a predetermined position thereof.

7. In a lamp-controller for electric printing apparatus, an electric lamp, a motor for causing the travel of the lamp, means for extinguishing the lamp automatically at a predetermined position thereof, and means for antomatically changing the direction of the travel of the lamp.

8. In a lamp-controller for electric printing apparatus, an electric lamp, an electric motor for causing the lamp to travel, and a switch operated by the motor for reversing the motor and cutting off current from the lamp.

9. In a lamp-controller for electric printing apparatus, an electric lamp, adapted to travel before the printing-surface thereof, a switch, contacts therefor connected to the lamp, and means whereby when the switch is placed on one of the contacts the lamp may burn or not at the will of the operator.

10. In a lamp-controller for electric printing apparatus, an electric lamp, aswitch,contacts therefor connected in parallel with the lamp, and a second switch in the circuit of one of the contacts, whereby, when the first switch is on the said one of the contacts and the second switch is open, the lamp will not burn, but when the first switch is on the said one of the contacts and the second switch is closed, the lamp will burn.

Signed at Pittsburg this 26th day of August, 1902.

SAMUEL BRENT WHINERY.

Witnesses:

F. N. BARBER, A. M. STEEN. 

